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  <title>Check built-in HTTP support</title>

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</div><hr /><div id="function.http-support" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">http_support</h1>
  <p class="verinfo">(PECL pecl_http &gt;= 0.15.0)</p><p class="refpurpose"><span class="refname">http_support</span> &mdash; <span class="dc-title">Check built-in HTTP support</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.http-support-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type">int</span> <span class="methodname"><strong>http_support</strong></span>
    ([ <span class="methodparam"><span class="type">int</span> <code class="parameter">$feature</code><span class="initializer"> = 0</span></span>
  ] )</div>

  <p class="para rdfs-comment">
   Check for features that require external libraries.
  </p>
  <p class="para">
   See the <a href="http.constants.html#http.constants.support" class="link">feature support constants table</a>
   for possible values for the <em><code class="parameter">feature</code></em> argument.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.http-support-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">feature</code></em></dt>

     <dd>

      <p class="para">
       feature to probe for
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.http-support-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns <span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>, whether requested feature is supported,
   or a bitmask with all supported features if <em><code class="parameter">feature</code></em> was omitted.
  </p>
 </div>


 


 


 <div class="refsect1 examples" id="refsect1-function.http-support-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4268">
    <p><strong>Example #1 A <span class="function"><strong>http_support()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">if&nbsp;(!</span><span style="color: #0000BB">http_support</span><span style="color: #007700">(</span><span style="color: #0000BB">HTTP_SUPPORT_REQUESTS</span><span style="color: #007700">))&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;die(</span><span style="color: #DD0000">"Need&nbsp;HTTP&nbsp;request&nbsp;support!\n"</span><span style="color: #007700">);<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>



 


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